Electropneumatic control apparatus.



W. M. SCOTT.

ELEGTROPNEUMATIG GONTROL APPARATUS.

APPLICATION FILED 00T.25, 1910.

W. M. SCOTT.

ELECTROPNEUMATIC CONTROL APPARATUS.

APPLICATION PILED 00T.25, 1910A.

1,096,061 Patented May 12, 1914.

4 SHEETS-SHEET 2.

Wdmeme f ma ,7 /af 75 W. M. SCOTTIV ELBGTROPNEUMATIG CONTROL APPARATUS.

APPLICATION FILED 0OT.25, 1910. i

Patented May 12, 1914.

4 SHEETS-*SHEET 3.

S A I "I fa g hummer Patented May 12, 1914.

4 SHEETS-SHEET 4.

W. M. SCOTT.

BLEGTBOPNEUMATIG CONTROL APPARATUS.

APPLICATION FILED 0012.25, 1910.

currents for lighting, power, or other pur-V form the' connections between successive secl Philadelphia,

hereinafter described and claimed.

4WILLIAM M. SCOTT, OF PHILADELPHIA, PENNSYLVANIA.

` ELECTROPNEUMATIC CONTROL APPARATUS.

Specification of Letters Patent.

Patented May 12, 1914 Application led October 25. 1910. Serial N o. 588,938.

To all whom, it may concern Be it known that I, WILLIAM M. Soorr, a citizenof. the United States, residing atin the co-unty of Philadelphia and State of Penns lvania, have invented a new and useful E ectropneumatic Control Apparatus, of which the following is a specification. c

My ,invention relates to lelectro-pneumatic control apparatusy for controlling, from a more or less remote point, electric circuits or branches or sections adapted to carry heavy poses.

My invention resides in apparatus, such Aas above referred to, and comprises an electric switch or circuit breaker, which may be of the non-closable type, and pneumatic apparatus for actuating and controlling the same, together with electrically controlled means for controlling the pneumatic apparatus.

My invention resides in apparatus such as above referredto, and in one mode of its use or application may be mounted in stations along a portion of an electric railway and tions -of the third rail or other contact conductor', and may be used to automatically disconnect such sections of the ,rail as may become grounded, and may reconnect them when normal conditions have been restablished.

My invention resides in other features For an illustration of one of t-he forms my apparatus may take, and for an illustration of 'one of its modes of application or use, reference is to be had to the accompanying drawings, in which;

Figure 1 is a side elevational view, some parts in section, of a 'circuit breaker with the accompanying pneumatic operatingy means. Fig. 2 is a side elevational view of a control switch. Fig. 3 is :VL front elevational view of the same.` Fig. 4 is a sectional View through the main pneumatic valve. Fig. 5 is a front elevational view of a circuit breaker and its pneumatic operating means, together with the controlling means, the base of the apparatus being omitted. Fig. 6 is a vertical sectional view. through the magnetically controlled pneumatic valve. Fig. 7 is a diagrammatic view4 illustrating one mode of vapplication or use of my apparatus. Fig.. 8 is a diagrammatic view illustrating a mode of use of my apparatus with lare disposed the main terminal blocks 2 and 3 of a switch or circuit breaker, studs 4 and 5 extending through the base 1 and communicating respectively with the main contacts 2 and 3. Adapted to bridge and connect the main terminal blocks 2 and 3 is provided the movable contact member 6, n

here shown laminated; the bridging member 6 is secured upon the arm 7 pivoted at 8 tothe housing 9. Secured upon and in electrlcal communication with the upper main terminal block 2 are the intermediate metallic shunt contact 10 and the carbon shunt contact 11, the latter pivoted at 12 upon the bracket 13. Cooperating with these shunt contacts are the movable metallic shunt convtact 14 and the movable carbon shunt contact 15 engaging respectively with the contacts 10 and 11. The movable'shunt contacts 14 and 15 are in electrical communication witheach other and by the iexible conductor 16 in permanent electrical communication with the lower main contact 3.

Pivoted on the arm 7sat 17 is the roller 18 adapted to be engaged by the cam surface 19 upon the operating lever 20 pivoted to the housing 9 at 21. Springs 20"L are attached to lever 20 and to the housing 9, for rotating the lever 2Q in a counter-clock wise direction (F ig. 1) when the breaker is tripped. Pivoted at 21 to the housing 9, but independently of the lever 20 is the actuator 22 having the transversely extending web 23 against which is adapted to -abut the lug 24 upon the dog 25 pivoted to the actuator 22 at 26. The dog 25 also has a lug 27 which is adapted to engage the web 23 to limit the pivotal movement of the dog 25 in clockwise direction upon its pivot 26, as viewed in Fig. 1. On t-he lever 20 is pivoted the roller 28, Fig. 5, adapted to be engaged by the hook latch 29 having limited movement upon the pivot 30. on the housing 9, a spring, not shown, urging the latch 29 upwardly. Independently-pivoted at 30 is a member 31 also having limited movement upon said pivot. A member 32 is also independent-ly pivoted at 30 and has a tail 33,

and carries two adjustable screws 34, one adapted to engage upon the top of the member 31 and the other upon the top of the latch 29. Pivoted at 35 on the lever 20 is the dog actuator 36 having limited movement upon the pivot 35, the limiting of the movementbeing secured by the lugs 37 and 38 adapted to engage the second roller 28 carried on member 20 beside roller 28. The dog actuator 35 has a lug 39 adapted to engage the nose 40 of the dog 25 to move the same from engagement withb the roller 28a. A spring 32a tends to hold the member 32 raised. The tail 33 of the member 32 extends into the path of travel of the member 41 pivoted to the base at 42 and carrying the arrrature 43 adapted to be attracted toward) the base 1 when thel current through tripping winding 3, shown diagrammatically in Fig. 7, of the switch or circuit breaker attains a predetermined value. The l/position of the armature 43 with respect to the poles which attract it, may be adjusted by the transverse adjustment of the handle 44.

The circuit breaker mechanism thus far described is similar to that described in my co-pendingf application Serial No. 563366,1i1ed May 25, 1910.

Secured to the base 1 is the acket or housing 4501:'` an electro-magnet whose winding is 46 and whose armature is 47. Attached to armature 47 is a vertically extending rod 48 which is limited in its downward movement by the collar 49 which at its upper end y carries a nut 50 adapted to strike the underside of the taill 33.

Secured upon the base 1 beneath the circuit breaker is the pneumatic, cylinder 51 within which is movable thepiston 52, the piston rod 53 `extending through the cylinder head 54 and carrying at its top a t-ransversely extending yoke or bar 55, to which is pivoted at 56 the downwardly extending links 57 pivoted at their lower ends to the double levers 58 pivoted at 59 in the bracket 60. Tension springs 55a are secured to the bar or yoke 55 to hold the links 57 in their downward position, shown in Fig. 1. In the cylinder head 54 is ya valve 61 held against its seat by the upwardly acting spring 62. When the piston 52 descends in the cylinder 51, the valve 61 opens against the opposition of spring 62 and allows ready ingress of air to prevent a partial vacuum above the piston 52.

Back of the base 1, Fig. 1, is the main pneumatic valve 63 shown in vertical section in Fig. 4. -VWith the top of this valve communicates the pipe 64, communicating with the supply pipe 65 which leads toa compressed-air tank or reservoir, not shown.y

A spring 66 holds the valve 67 down yupon its seat 68. A downwardly extending rod 69 is secured upon the-valve 67, and is surrounded by spring '70 which opposes the upward movement of the stem 71 on the plunger 72Ldisposed in the ch-amber 73 with which communicates the pipe 74 leading to the magnetically controlled pilot valve shown in Fig. 6. With the side of the valve 63 communicates a pipe 75, which communicates with the lower end of the cylinder 51.

The pipe '74 of valve 63 communicates with the port 77 of the magnetically controlled valve 76, see Figs. 5 and 6. The valve 78 is seated in the member 79 and held against its seat by the spring 80 resting at its lower end upon the perforated diaphragm 81 in the member having the central aperture 83 communicating with the pipe 84 communicating with the air supply pipe 65, Fig. 1. The valve 78 closes communication between the supply pipe 84 and the port 77 and is supported-upon a rod or needle 85 which may be forced downwardly by the rod 86 which is attached. at its upper end to the armature 87 of an electro-magnet whose winding is 88, inclosed by casing 88a, a Hat spring 89 normally holding the rod 86 elevated when the winding 88 is denergized. When the electro-magnet is energized the rod 86 is depressed, lifting the valve 78 from its seat in opposition to t-he spring 80, whereupon air passes from the supply pipe 84 to the port 77 and thence through pipe 74 to the valve 63. With the rod 86 thus depressed the ports 90 are closed by rod 86 closing passages 85a; when the magnet is denergized the sprin 80 returns the valve 78 against its seat an the spring 89 lifts the armature 87 and rod 86 and simultaneously the ports 90 are opened, allowing exhaust from port 77 and pipe 74 to the external atmosphere.

Upon a crank 91, attached to and movable with the operating lever 20, there is pivoted at 92 a downwardly extending rod 93 pivoted at its lower end at 94 to the actuating member 95 of a snap switch mounted in front of the cylinder 51, Figs. 1 and 5. This snap switch is shown in larger scale in Figs. 2 and 3, and is shown to be insulated from its support by the insulating material v96. The switch comprises two pairs of stationary contacts, one pair 97 and 98 and the other 99 and 100. The switch'blades 101 and 102 are electrically connected to each other and adapted to engage respectively the contacts 97 and 98. The switch blades 103 and 104 are electrically connected together and are movable with but insulated from the switch'blades 101 and 102, and are adapted to engage yrespectively the switch contacts 99 ,and 100. Wh'en the switch blades 101 and 102 are in engagement with contacts 97 and Y 98, the parts are latched in such position, and in such case the switch blades 103 and 104 are out ofengagement with switch contacts 99 and 100. When the switch or circuit breaker is tripped, the rod 93 moves upwardly and carries the switch blades 101 and l 102 into engagement with contacts 97 and 98 and removes switch blades 103 and 104 from contacts 99 and 100. lVhen the circuit breaker or main switch is closed, the rod 93 moves downwardly and winds up the snap switch spring 105 andl thereafter removes the detent to allow the blades 101 and 102 to snap away from contacts 97 and 98, and si- 114 upon the rod 111.

multaneously switch blades 103 and 104 engage contacts 99 and 100.

Pivoted at its lower end at 106 is thevrod 107 pivotedat its upper end to the actuator 22 'of the switch or circuit breaker.

Upon the base 1, see Fig. 5, there is mounted also an electro-magnet or relay having armature 108 and winding 109 (Fig. 7) said winding being inclcsed in a casing 110. The

armature 108 carries rod 111- upon which is supported, though insulated from it. the bridging member 112 resting upon the spring 113l which, in turn, rests upon the nut When the electromagnet is energized, the armature 108 is held in raised position bringing the contact member 112 into engagement with and connecting the contacts 115 and 116.

Referring to Fig. 7, B is an automatic circuit breaker, located, for example, at a power station, current being passed through the breaker to the various sections each con trolled by a section breaker S, such as shown in Fig. 1. The breaker B i's sho-wn simpliiied, and as comprising main terminal blocks a and b, bridged bythe main movable contact. c, an overload coil e serving 'or trippin'g purposes as well understood in the art. When the circuit breaker B is closed, in the position show'n in Fig. 7, it holds the bridging contact f out of engagement with the contacts g and L, thus interrupting the circuit extending from the storage battery or. other source of energy z' through the fuse j, conductor c, switch m, incandescent lamp n, conductor 0, contact g, member f, Contact 7L, conductor p, tripping coil 46, conductor q, fuse 1' to battery When, however, the station circuit breaker B is tripped and opens, the contact f is forced into engagement with col'itacts g and L', by a spring, not shown, closing the circuit just traced and energizing the electro-magnet 46 which then attracts its armature 47, and through rod 48 and nut 50 lifts the tail 33, Fig. 1, depressing the member 32 which, thereupon, depresses latch 29 to free the movable parts of the section breaker S, such section breaker being accordingly tripped andY opened.`

WVhen the station breaker B is again closed,

the contact'f is separated from contacts g and Iz., again opening the circuit of the tripping coil 46. When' the section breaker S opens, the contacts 97 and 98 are bridged through switch blades 101 and 102, short circuiting the trip coil 46; and, simultaneously,

Iswitch blades 103 and 104 separate from conj, conductor is, switch m, lamp n', conductor t, contact 115, bridging member 112, contact 116, conductor u, winding 88, conductor o, to conductor g, through fuse 1 to battery e'. The electro-magnet 88 is, therefore, energized and removes valvev78 from its seat, allowing air from the compressed air su ply to passin through pipe 84 to port 717, thence through pipe 74 to valve 63. The air pressure lifts the plunger 72 which then rises to the upper end of its chamber 73v closing oli' the passage 71L which communicates through port 71b to the external atmosphere, and compresses` spring and lifts valve stem 69 lifting the valve 67 from its seat 68 in opposition to spring 66, allowing air from the compressed air supply to flow from pipe 64 past the valve 67' and into the pipe 75 through passage 75ay to cylto the action of the springs 55. The actu,

ator 22 and the lever 20 are accordingly mechanically connected for any downward movement of the rod'107. The admission ot the air to the underside of the piston 52, therefore, raises said pist-oncarrying the links 57 upwardly and causing them to rotate levers 58 in a clockwise direction about their pivot 59, pulling downwardly on the rod 107. This action returns the circuit breaker S to normal position, the latch 29 engaging the roller 28 when this position is reached. With the closure of the circuit breaker S the. rod 93 has been depressed, causing switch levers 101 and 102 to separate from contacts 97 and 98 and to cause the bridging of contacts 99 and 100 by the switch levers 103 and 104, short circuiting the winding 88 of the magnet which controls the pilot. air valve. This magnet is dener gized by this short circuiting, and the spring 89 accordingly raises rod 86 and allows spring to close the valve 78 and to allow an exhaust ot air from the port 77 and the pipe 74 which connects with it. rllhereupon,

the spring -70 ret-urns theplunger 72 to its lo-wermost position, as viewed in Fig. 4.

ioo

71a and port 71b allows communication to lthe outer atmosphere above the plunger 72 and exhaust fromfc'ylinder 51. The valve 68 accordingly returns to its seat and shuts od the air supply :trom the pipe 75 to 'the lower end cit` the cylinder 51. rlie springs 55a contract and pull downwardly upon the links 57 which engage the levers 58 and litt the rod 107 to return the actuator 22 to the position shown in Fig. 1, and to insure the prompt return or" the piston 52 to the bot tom of the cylinder 51, the valve 61 opens and allows ingress of air to prevent vacuum above the piston 52.

'llhe operator at the station where breaker B is locatedmay ret-urn the switch lm, to the left hand position, as viewed in Fig. 7, and the operations herein described may then be repeated.

1f it should be attempted to vclose the section breaker S during the time that winding 46 of the tripping magnet is energized, or during the occurrence of a predetermined or other electrical condition upon the. circuit including ltripping coil 3a, the tail 33 will be held elevated and the latch 29 depressed, as well as the dog actuator 36, this action preventing the closure of the circuit breaker during any of these conditions; z'. e.,

' `cannot be restored to circuit closing posi-' the circuit breaker is shown as a nonclosable breaker.

rlhe circuit ofy the pilot valve magnet 88 is controlled by the relay or electro-magnet 109, one terminal 'of the winding 109 being connected to the section of third ra-il or other contact conductor fw, while the other terminal is connected to earth or-other return ai. While substantial voltage remains upon the line sect-ion, the electro-magnet 109 remains energized and keeps the circuit closed at contacts 115, 112 and 116. But,v

should the voltage upon t-he line fall below a predetermined limit, the armature 108 will fall and bridging member 112 will separate from contacts 115 and 116,*thus preventing the energization 'of the'm'agnet. 88 during -the continuance of this condition. From this it follows that the section breaker S tion during this condition upon the `section of the lin. 4

In Fig. 8 is shown.diagrammatically an arrangement of duplicate control circuits for thesection breaker S. Two trip coils 46 and 461 are provided as well as two pilot valve magnets 88 and 88a, the snap switch having duplicated contacts, the upper con.- tacts controlling the pilot valve magnets, while the lower contacts control the tripn ping coils.

1f the bperator wishes to trip the breaker lS, he pulls outwardly on the handle 117 in opposition to lthe/spring 118, bringing the contact 119 intoengagement withA contacts 120 and 121, short circuiting the indicating lamp 122 'andallowing current to iiow from Vbattery through' fuse r, contacts 120, 119,

in the position shown in Fig. 8, the lamps 121, conductor 123, thence from Contact 98 to contact 97, through the blades 102 and 101, thence by conductor 124 through the tripping coil 46, conductor 125; through fuse j to battery c'. The coil 46 is accordingly energized and trips the circuit breaker. And, similarly, if the left hand control should be out of order the right hand control may be employed to similarly energize the vduplicate tripping magnet 46, by the operator pulling outwardly upon the handle 117, the magnet 46a operating upon the same tripping member as magnet 46.

rllhe movable switch blades. of the duplicated snap switch all .move together, and, accordingly, when the breaker S is tripped by either magnet 46 or magnet 46, contacts 97 and 98 are disconnected from each other, while contacts 99 and 100 are bridged by 103 and 104 and 99a and 100a are bridged by 103a and 1043. Then the operator may close the breakerS by either the left hand or right hand control. Pulling outwardly upon the handle 126 in opposition to spring 127, causes the contact 128 to bridge the contacts 129 and 130 to short circuit the indicating lamp 131 and allow current to pass from the battery z', through fuse r, contacts 129, 128, 130, conductor 132, contact 100, contacts 104, 103, 99, conductor 133, thence through the winding 88 of the pilot valve magnet and resistance 134 in parallel, thence through fuse j to battery i. This energizes the pilot valve which, in turn, controls the main valve 63,

which allows compressed air to pass into the cylinder 51 to move the piston 52 to close the breaker, as hereinbefore described. Or, if the left hand control circuit is out of order, the right Y hand circuit may be employed, whereupon pulling outwardly Vupon the handle 126 will cause the pilot valve magnet 88 to be energized to lcontrol the same pilot valve.

The resistances 134, C134 are employed when the magnets 88 and 88 are to be used with a control circuit of a potential so great that if the resistances were not used the windings 88 and 88a would overheat.

llt will bev noted that in the arrangement of Fig. 8, the magnets 46 and 46a and 88 and 88a are not short circuited by the controlling snap switch, but that the contacts of this switch are in series with the magnets. r1`his may also be the arrangement employed in connection with Fig. 7.

i ln connection with Fig'. 8, a relay, similar to 109, of Fig. 7, may be employed, two pairs lioi's of contacts being then provided, one pair lo- 122, 122* will indicate by their glowing, that the apparatusl isinl .condition to be tri ped; z'. e., that'the breaker S is closed. A terA it is tripped, ,the lamps 122 and -122a will not glow, out thelainps 13 1 and 131 will glow, indicating that'the circuit through magnets 8 8aI'1vd-Q88"L is complete and'that .the apparatus is in condition to close the breaker S. If either of the control circuits Ais out of order, it will 4i'rilicated by 'the fact that oneor apotli'erof the 1' candes'cent lamps does not g ow. A A What 1 claim iS:

l. "Ilhe oombinationwith the movable contact Vof a switch 1orfcircuit breaker, of an `operating men'itmrV therefor, an actuator for said 'operating member,`tripping mechanism,

a pneumatic device acting 1n one direct-ion toacfuat 'Said actutaf and means fOr rturning"said actuatorto normal-4 position, andV means preventing `operation of said pneumatic device until after said switch or circuit breaker/,liasbeen tripped.

2;"The'combination with 'a movable contact of fa switch o r circuit breaker, of an operating' member therefor, an actuator adapted to engage and ac tuate V said operating member lin one. direction, a spring forl returning Said actuator to normal position, and' .means moving in unison with'said op- Graine menberwnnraling'actuation of Said actuator.'

The combination with a movable contact of a vsv v. t `;l 1'or circuit breaker',of an opetng'lmembr therefor, .tripping mechanism, an actuator adapfd t0 engage and a0- tuate "said 'operating member in one direction, a spring for returning said actuator to normal positioxi, a pneumatic device for actuating said actuator in one direct-ion to ao tuatesaid operating member, and means preventingoperation of said pneumatic device untilfafter s aid'switch or circuit breakerV has been tripped.

4. The combination with a movable contactof a Switch o r circuit bre kcigof an operating member" therefor, @flapping mechenism, an actuator' adapted to engage and actuate said operating member in one'direction, a `spring vforreturning said actuator to Anormal position, a pneumatic device for actuating said actuator in one direction to actuate said operating member yin opposition to said spring, and means preventing operation of said pneumatic device until after said switch or circuit breaker has been tripped. t

5. The combination with the movable contact of a switch orcircuitbreakenof'an operating `men'iber therefor, `an actuator f or said. operating n ieIIiber, a pneumatic device acting' one directionjoactuate said actuator, means for:returning said actuator to normal position, a..,va1ve controlling said pneumatic device, and means l responsive to movement of said operating member controlling said valve.

' 6. The combination with the movable contact of a switch or circuit breaker, of an operating member therefor, an actuator for said operating member, a pneumatic device acting in one direction to actuate said actuator, means for returning said actuator to normal position, a main valve controlling said pneumatic device, a pilot valve controlling said main valve, and means responsive to movement of said operating member controlling said pilot valve.

7. The combination with the movable `con- I tact of a s witch or circuit breaker, of an operating member therefor, an actuator for said operating member, a pneumatic device actmg 1n one d1rect1on to actuate said actuator, means for returning said actuator to normal position, a main valve controlling said pneumatic device, a pilot valve controlling said main valve, electro-responsive means controlling said pilot valve, and a switch movable in definite relation with respect to said movable contact controlling lsaid electro-responsive means.

8. The combination with a movable'contact of aswitch or circuit breaker, or' an operating member therefor, an actuator adapted to engage and actuate said operating vmember in one directiom'a spring for retuating said actuator Vin one direction to actuate said operating member, a valve controlling said pneumatic device, and means actuated with said operating member controlling said tripping mechanism and said pneumatic device.

10'. The combination with the movable member of a switch or circuit breaker, of an operating member therefor, an independently movable actuator, lelectro-responsive means for tripping said switch or circuit breaker, a control switch lcontrolling said electro-responsive means, a motive device for actuating said actuator in one direction only, a switch controlling said motive device, and a connection between said operating member and said control switches for actuating said lcontrol switches.

11. The combination with the movable member of a switch or circuit breaker, of an acsacei operating member therefor, an independ cntly movable actuator, a tripping magnet rfor said switch or circuit breaker, a control switch controlling saidtripping magnet, a motive device for actua-ting said actuator in one direction only, a switch controlling said motive device, and means for actuating said control switches independently of said actuator and in unison with said operating member.

12. The combination with the movable member of a switch or circuit breaker, of an operating member therefor, an independentljy movable actuator, a pneumatic device for act-uating said actuator, a valve controlling said pneumatic device, electro-responsive means controlling said valve, a control switch controlling said electro-responsive means, and a connection from said operating' member to said control switch for actuating the same.

13. yll`he combination with the movable member of a switch or circuit breaker, of an operating member therefor, an independently movable actuator, a pneumatic device for actuating said actuator, electro-pneumatic means controlling said pneumatic device, felectro-responsive means controlling .said electro-pneumatic means, a control switch controlling said electroresponsive means, and a connection from said operating member to said control switch for actuating the same.

14C. The combination with the movable member of a switch or circuit breaker, of an operating member therefor, an independ* ently movable actuator, a pneumatic device for actuating said actuator, electro-responsive means controlling said pneumatic device, electro-responsive means for tripping said switch or circuit breaker, a control switch for each of said electro-responsive means, and means for actuating said control switches in unison with said operating member. f l

15. The combination with the movable l member of a switch or cricuit breaker, of an vfor operating said control switches.

16. The combination with the movable member of a switchI or circuit breaker, of an operating member therefor, an independently movable actuatorpa pneumatic device for actuating said actuator, electro-responsive means controlling said pneumatic device, electro-responsive means for tripping said switch 4or circuit breaker, a control.

switch for each of said electro-responsive means, and means operating in unison with said operating member for opening one of said control switches and closing the other.

17. rll`he combination with the movable member of a switch or cricuit breaker, of an operating member therefor, an independently movable actuator, a Vpneumatic device for actuating said actuator, electro-responsive means controlling said pneumatic device, 'electro-responsive means for tripping said switch or circuit breaker, a control switch for each of said electro-responsive means, and a connection from said operating member to said control switches for opening one of said control switches and closing the other.

18. '.lhe combination with the movable contact of a switch or circuit breaker, of an operating member therefor, an independently movable actuator, a motive device for actuating said actuator in one direction only, a switch controlling said motive device, andv means for actuating said switch independently of said actuatorand in unison with said operating member.

19. The combination with the movable contact of a switch or circuit breaker, of'an operating member therefor, an independently movable actuator, a motive device for actuating said actuator in one direction only, means for returning said actuator to normal position, a switch controlling said-'motive device, and a connection from said-V operating member to said control switch for actuating the same independently-'of said actuator. f

20. The combination with the movable member of a switch or circuit breaker, of an operating member therefor, an independently movable actuator, a motive device for actuating said actuator in one direction only, electro-responsive means for tripping said switch or circuit breaker, control switches for controlling said motive device and said electro-responsive means, and (means for a'ctuating said control switches independently of said actuator and in unison with said operating member. 4

21. The combination with the movable' member of a switch or circuit breaker, of an operating member therefor, an independently movable actuator, a motive device for actuating said actuator in one direction only, means for returning saidactuator to normal position, electro-responsive means for tripping said switch or circuit breaker, control switches for controlling said 'motive device and said electro-responsive means, and a connection from said operating member to said control switches for actuating the same independently of said actuator.

22. The combination with-then1ovable member of a switch or circuit breaker, of an operating member therefor-,fw an `independently movable actuator, a motive device' for iso l 1 actuating said actuator in one direction only,

means for returning said actuator to normal position, electro-responsive means for tripping said switch or circuit breaker, control switches for controlling said motive device and said electro-responsive means, and means operating independently of said actuator and in unison with said operating member for opening one of said control switches and closing the other.

23. The combination with the movable contact of a switch or circuit breaker, of an operating member therefor, an indepeiidently movable actuator, a motive device for actuating said actuator in one direction only, and a control switch controlling said motive device, said control switch controlled in its movement in one direction by said actuator through said operating member, and in opposite direct-ion by said operating member only.

24A, The combination with the movable contact member of a switch or circuit breaker, of an operating member therefor, an independently movable actuator, a motive device for actuating said actuator in one direction only, a trip coil for tripping said switch or circuit breaker, and a control switch controlling said trip coil, said control switch controlled in its movement in one direction by said actuator through said operating member, and in opposite direction by said operating member only.

25. The combination with an electric switch having a movable contact member, an operating member therefor, an actuator independent of said operating member adapted to move said o-perating member in one direction only, means for restraining said Contact member in normal position independently of said actuator, a motive device for actuating said actuator in one direction only, a trip coil, and a switch controllingthe circuit of said trip coil operated in one direction Iwith said operating member by said actuator, and in opposite direction independentlv of said actuator.

26.' The combination with an electric switch having a movable contact member, an operating member therefor, an actuator iiidependent of said operating member adapted to move said operating member in one direction only, means for restraining said contact member in normal position independently of said actuator, a niotive device for actuating said actuator in one direction only, a trip coil, and a switch controlling the circuit of said trip coil operated in one direction with said operating member by said actuator, andiii opposite direction iiidependently of said actuator, and a control switch for said motive device movable with said trip coil switch.

27. The combination with an electric switch having a movable contact member, an operating member therefor, an actuator independent of said operating member, means for connecting said actuator and operating member for movement in one direction only, of a motive device for actuating said actuator in one direction only, means returning said actuator to normal position, a switch controlling said motive device, and ineaiis'for moving saidlcontrolling switch in unison with said contact member independently of said motive device.

28. The combination with an electric switch having a movable contact member, an

operating member therefor, an actuator independent of said operating member, means for connecting said actuator and operating member for movement in one direction only, of a motive device for actuating said ac tuator in one direction only, means returning said actuator to normal position, a switch controlling said motive device, means for moving said controlling switch in unison with said contact member independently of said motive devicef a trip' coil for disconnecting said actuator from said operating member, and a switch controlling said trip coil moving in unison with said contact member.

29. The combination with a circuit breaker and its tripping mechanism, of an operating member for said movable conta-ct member. an actuator for said operating memberl movable independently thereof, .a motive device for actuating said actuator in one direction only, and means preventing operation of said motive device until after said circuit breaker has been tripped.

30. The combination with amovable coiitact member of a switch or circuit breaker and its tripping mechanism, of an operating 'member for said contact member, an actuator for said operating member movable independently thereof, a motive device for actuating said actuator in one direction only, and means preventing operation of said tripping mechanism vwhile said actuator is actuated byl said motive device.

In testimony whereof I have hereunto aiiixed my signature in the presence of the two subscribing witnesses.

WILLIAM M. SCOTT.

Witnesses:

' E. T. MCCALL,

ANN E. S'rEiNBooit. 

